Which of the following logs is used for event investigation and documentation in a SaaS environment?

In a Software as a Service (SaaS) environment, the webserver log plays a crucial role in event investigation and documentation. These logs capture various activities and interactions that take place on the webserver, which can include user access patterns, errors, and other significant events that occur during the operation of the application. By analyzing webserver logs, security teams can identify potential security incidents, track user behavior, and ensure compliance with security policies and regulations.

The detailed events stored in webserver logs are invaluable when investigating suspicious activities or understanding the context surrounding specific incidents. They provide a historical record of all requests received by the server, which is essential for tracing user actions and diagnosing issues that may arise. Moreover, in a multi-tenant SaaS environment, these logs can help in isolating events to specific users or sessions, aiding in forensic analysis and improving overall security posture.

The other logs listed, while useful in their own right, do not primarily focus on the documentation of user events in the same manner. For example, DNS server logs deal with domain name resolution, API access logs track usage of APIs but may not contain comprehensive contextual information about user actions, and virtual machine manager logs are more oriented towards the management of virtual infrastructure rather than direct